Question

Statement-I: RMgX reacts with CO$_2$ followed by acidification to form product, which reacts with NH$_3$/Δ and then reacts with NaOCl to form product which further reacts with CHCl$_3$/NaOH and final product is R–N≡C.
Statement-II: R–N≡C on hydrolysis gives RCOOH.

• A. Statement-I and Statement-II both are correct
• B. Statement-I is incorrect, Statement-II is correct
• C. Statement-I is correct, Statement-II is incorrect
• D. Statement-I and Statement-II both are incorrect

Hint:

Isocyanides are formed via carbylamine reaction and do not hydrolyse to carboxylic acids.

Answer 1

The Correct Option is C

Statement-I Analysis:
RMgX reacts with CO$_2$ followed by acidification to give RCOOH.
RCOOH reacts with NH$_3$/Δ to form amide.
Amide reacts with NaOCl to give amine (Hofmann bromamide reaction).
Amine reacts with CHCl$_3$/NaOH to form isocyanide (carbylamine reaction).
Thus, Statement-I is correct.
Statement-II Analysis:
R–N≡C (isocyanide) on hydrolysis does not give carboxylic acid.
Hence, Statement-II is incorrect.